摘要
用68个中心拉拔试件试验研究了不同直径BFRP筋材与水泥基材料的粘结性能,并进行了2组多束BFRP筋材锚杆现场拉拔试验。试验结果表明,BFRP筋材与砂浆粘结强度一般大于4.5 MPa,锚杆设计时,BFRP筋材锚杆与砂浆的粘结强度标准值可取4.0 MPa,设计值可取2.0 MPa。多束BFRP筋材组成锚杆时,平均单根锚杆极限抗拔力约为筋材极限抗拔力的77.3%~82.1%。采用BFRP筋材替代钢筋锚杆,可根据极限抗拔力,按等强度替代原则进行设计。试验结果为BFRP锚杆设计提供了必要的参数。
In this paper,68 test specimens were pulled out in center for studying the bond property between varying diameters BFRP rebars and cement-bases materials, and 2 multi-beam BFRP rebar bolts were pulled out in field. The result shows that the bond strength between BFRP rebars and mortar is more than 4.5MPa generally,and the strength standard value is recommended 4. 0 MPa,while the design reliable value is 2. 0 MPa. The ultimate pullout capacity of each bolt of multi-beam BFRP rebar bolts is about 77. 3% -82. 1% of the ultimate pullout capacity of BFRP rebars. Based on the ultimate pullout capacity and with the principle of equal strength replacement, the steel anchors can be replaced by BFRP rebars. Necessary parameters are provided to the design BFRP rebar anchors by the results of the experiment.
作者
赵文
杨国梁
赵明
ZHAO Wen YANG Guoliang ZHAO Ming(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 610031 ,China Guangdong Province Road and Bridge Construction Development Co. , Ltd. , Guangzhou 510000, China)
出处
《四川建筑科学研究》
北大核心
2017年第1期113-117,共5页
Sichuan Building Science
基金
广东省交通运输厅科技项目(科技-2013-02-012)
